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Cost-effective single-chip solution for stereo
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headset and wireless speaker applications
A2DP1.2 and AVRCP1.0 profiles enabled with
SBC encoder for streaming audio over Bluetooth
MP3 decoder for improved audio quality and
High-quality audio 95dB SNR on DAC playback
FastStream, CSR’s low-latency codec for video
HFP 1.5 (includes 3-way calling) and HSP 1.0
Low-power consumption: over 10 hours of audio
Fully-qualified Bluetooth v2.1 + EDR specification
system with support for secure simple pairing
Best-in-class Bluetooth radio with 7dBm transmit
Integrated 1.5V and 1.8V linear regulators
68-lead 8 x 8 x 0.9mm, 0.4mm pitch QFN package
Green (RoHS and no antimony or halogenated
Development Kit (includes example design)
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Stereo headset solution with support for echo and
_äìÉqìåÉë=olj=nck integrates a Bluetooth radio,
baseband, DSP, high-quality audio codec, SMPS,
LDOs and a battery charger for minimal BOM,
BlueTunes ROM QFN includes as standard cVc single
microphone algorithm for echo and noise suppression.
BlueTunes ROM QFN uses advanced DSP features
cVc 1-mic provides ful duplex echo cancellation and a
for the latest stereo enhancements to improved audio
quality; including SBC and MP3 decoder, support for
The cVc dual microphone algorithm provides >30dB of
FastStream (low-latency codec) and 5-band EQ.
noise suppression in both dynamic and stationary
noise conditions such as babble, road, music and
competing voices. In addition an acoustic echo
canceller is now integrated into the cVc dual-
microphone solution, further enhancing the far-end
user-experience. This dual-microphone algorithm is
BlueTunes ROM QFN includes secure simple pairing,
which greatly simplifies the pairing process, making it
even easier to use a Bluetooth headset.
BlueTunes ROM QFN is available in a 8 x 8 x 0.9mm
Common TX/RX terminal simplifies external
matching; eliminates external antenna switch
support for SBC and MP3(1) codec for improved
Bluetooth v2.1 + EDR specification compliant
Single-cycle MAC; 24 x 24-bit multiply and 56-bit
7dBm RF transmit power with level control from on- ■
32-bit instruction word, dual 24-bit data memory
chip 6-bit DAC over a dynamic range >30dB
6K x 32-bit program RAM, 8K x 24-bit + 8K x 24-bit
Class 2 and Class 3 support without the need for an
64 x 32-bit program memory cache when executing
Digital demodulator for improved sensitivity and co- ■
Integrated amplifiers for driving 16Ω speakers; no
Real-time digitised RSSI available on HCI interface
Support for single-ended speaker termination and
Fully integrated synthesiser requires no external
VCO, varactor diode, resonator or loop filter
Compatible with crystals 16MHz to 26MHz or an
48KB of internal RAM, allows full-speed data
transfer, mixed voice/data and full piconet support
Logic for FEC, HEC, access code correlation, CRC,
Synchronous serial interface for system debugging
demodulation, encryption bit stream generation,
I2C compatible interface to external EEPROM
containing device configuration data (PS Keys)
Transcoders for A-law, μ-law and linear voice from
host and A-law, μ-law and CVSD voice over air
FastStream, CSR low latency codec significantly
reduces the latency of the audio link, from source to
sink, avoiding lip-sync issues when simultaneously
listening to audio and watching video images
Crystal oscillator with built-in digital trimming
Configurable stereo headset ROM software to set-
Power management includes digital shutdown and
wake-up commands with an integrated low-power ■
HFP 1.5 (including 3-way calling) and HSP 1.0
oscillator for ultra-low power Park/Sniff/Hold mode
Clock request output to control external clock
Bluetooth v2.1 + EDR specification Secure Simple
On-chip regulators: 1.5V output from 1.8V to 2.7V
DSP based single-microphone cVc echo and noise
On-chip high-efficiency switched-mode regulator:
reduction is included in the BlueTunes ROM QFN
A new high-performance dual-microphone noise
Power-on-reset cell detects low-supply voltage
reduction is available in BlueTunes ROM QFN as a
licensed option for an extra 20dB of noise
On-chip 150mA charger for lithium ion/polymer
suppression, order code BCSW‑CVC‑HS‑2M‑R3
(1) MP3 decode functionality requires an appropriate license from Thomson
MP3 decode functionality requires an appropriate license from Thomson.Until BC57F687A05 reaches Production status, engineering samples order number applies. This is
BC57F687A05-ES-IQF-E, with no minimum order quantity.BlueTunes ROM QFN is a ROM-based device where the product code has the form BC57F687Axx. xx is the
specific ROM-variant, 05 is the ROM-variant for BlueTunes ROM Stereo Headset Solution.At Production status Minimum Order Quantity is 2kpcs taped and reeled.
To contact a CSR representative, email or go to 2.1
BlueTunes ROM Stereo Headset Solution Development Kit Ordering
BlueTunes ROM Stereo Headset Solution Development Kit,
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Bluetooth logos are trademarks owned by Bluetooth SIG, Inc. and licensed to CSR. Other products, services and names used in this document may
have been trademarked by their respective owners.
The publication of this information does not imply that any license is granted under any patent or other rights owned by CSR plc.
CSR reserves the right to make technical changes to its products as part of its development programme.
While every care has been taken to ensure the accuracy of the contents of this document, CSR cannot accept responsibility for any errors.
CSR’s products are not authorised for use in life-support or safety-critical applications.
Refer to mpliance and conformance to standards information.